The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2001
Filed:
Mar. 26, 1999
Seiji Nomura, Kure, JP;
Satoshi Nanba, Higashihiroshima, JP;
Mazda Motor Corporation, , JP;
Abstract
In order to provide a method of joining a cylinder head,and a valve seat,by press and heat generated on passing an electrical current through both members,to achieve satisfactory joining with minimized heat generated inside when the current is supplied, while eliminating the need for an infiltration step and reduce the production cost, inhibiting an increase in thermal conductivity of the valve seat,and improving the wear resistance thereof. The valve seat,is made of a sintered material made from a powdery material with a high electrical conductivity element such as Cu dispersed therein. The current and the pressure are applied with a first joining surface,of the valve seat,and a joining surface,of the cylinder head body,being put into surface contact with each other in advance.